JPH067195U - High frequency heating device - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a high-frequency heating device with selectable maximum current consumption. [Structure] Power consumption is substantially constant according to the cooking contents of an inverter power supply unit 3 that supplies a high frequency high voltage to a magnetron 2 that supplies a high frequency into a heating chamber 1 that heats and heats an object to be heated. A readable / writable non-volatile memory that stores the settings of the microcomputer 4 that transmits predetermined power data and the maximum current setting means 5 that sets the maximum current consumption for heating and cooking even after a power failure is restored. 7 and 7. [Effect] The high-frequency output can be controlled so that the maximum current consumption can easily fall within the set value, enabling parallel operation with electrical products that could not be used because the breaker shuts off, even after re-energizing after a temporary power failure. It is not necessary to reset the set value, improving usability.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a high-frequency heating device such as a microwave oven which heats and cooks an object to be heated by driving a magnetron with an inverter power supply that generates a high voltage having a frequency higher than a commercial frequency.

[0002]

[Prior art]

 Many types of microwave ovens that drive the magnetron with an inverter power supply are now on the market due to the advantages of significantly reducing the weight of the power supply and varying the high frequency output of the magnetron.

There is also a strong demand for higher power in order to shorten the cooking time. Therefore, it has been proposed that the high frequency output be made larger than in the steady state at the beginning of cooking when the temperature of the switching element of the inverter power supply is low. There is. (See JP-A-1-194287)

[0004]

[Problems to be solved by the device]

 As mentioned above, the maximum current consumption of microwave ovens and rice cookers tends to increase year by year due to the shortening of cooking time and the improvement of cooking performance by high power.

Further, due to the widespread use of electric appliances such as electromagnetic cookers and tableware dryers, the maximum power consumption of general households has been increasing significantly in recent years.

However, the contract current amount with the electric power company in general households is mostly 15 A to 30 A, and when a plurality of high power electric appliances are used in general households at the same time, the breaker may be interrupted frequently. There is.

For this reason, when using a microwave oven that consumes a large amount of current, it is necessary to temporarily suspend the use of other electric products or to wait until the operation of other electric products is completed. It was very inconvenient to use.

[0008]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems, a readable / writable non-volatile memory for storing the setting contents of the maximum current setting means for setting the maximum current consumption for cooking is provided and a high frequency high voltage is supplied to the magnetron. A microcomputer that sends predetermined power data to the inverter power supply unit according to the contents of cooking so that the amount of power consumed for heating and cooking can be adjusted to be almost constant according to the above-mentioned settings. Is.

[0009]

[Action]

 The maximum current consumption of the microwave oven can be controlled by setting the high-frequency output so that it can be easily set and changed by the maximum current setting means, and the set value described above is stored in the non-volatile memory. Therefore, it is not necessary to reset the set value described above even when the power is turned on again after a temporary power failure or breaker break.

[0010]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a system block diagram of a high frequency heating apparatus according to an embodiment of the present invention. In the figure, reference numeral 1 denotes a heating chamber for heating and heating an object to be heated, and a magnetron 2 for supplying high frequency to the heating chamber 1 is attached to the heating chamber 1.

Reference numeral 3 denotes an inverter power supply unit, which receives predetermined power data transmitted from the microcomputer 4 according to the cooking contents of the object to be heated and supplies a high frequency high voltage to the magnetron 2, It is controlled so as to obtain a predetermined high frequency output according to the power data.

Reference numeral 5 denotes a maximum current setting means for transmitting a current amount setting signal to the microcomputer 4 each time the amount of current that can be supplied during cooking of the object to be heated is set.

Reference numeral 6 denotes a display means, which is a portion where the setting contents set by the maximum current setting means 5 are displayed via the microcomputer 4 described above.

Reference numeral 7 denotes a readable / writable non-volatile memory that stores the setting content set by the maximum current setting means 5 via the microcomputer 4. When this non-volatile memory is built in the microcomputer, it need not be provided separately from the microcomputer as in the present embodiment.

FIG. 2 shows an example of transition of display contents displayed on the display means 6.

In the figure, (a) shows a maximum current amount setting (for example, 15 A), (b) shows a current amount of 12 A, and (c) shows each display content when the current amount is 10 A.

Each time the display means 6 operates a switch (not shown) of the maximum current setting means 5, the display means 6 is described as follows: (a) → (b) → (c) → (a) → ... The display contents are sequentially switched via the microcomputer 4.

Next, the operation of the above configuration will be described.

When the user puts the object to be heated in the heating chamber 1 at the time of cooking and sets the operation panel (not shown) to, for example, (strong output, 4 minutes) and presses the start button (not shown) Will start.

Normally, when the maximum current setting means 5 is set to the maximum value, the display state is as shown in FIG. 2A. At this time, the above-mentioned cooking outputs a high frequency output of about 700 W, About 14A flows and cooking is completed in about 4 minutes. (14A × 240SEC = 3360A.SEC) Next, when the maximum current setting means 5 is set to 12A, it is displayed that the current limiting function of 12A is operating as shown in Fig. 2 (b). To do.

At this time, in the above-mentioned cooking, a high frequency output of about 600 W is output, a power supply current of about 12 A flows, and the cooking time is calculated in the microcomputer 4 and extended to about 4 minutes and 40 seconds. (12A × 280SEC = 3360A.SEC) Similarly, when the maximum current setting means 5 is set to 10A, it is displayed that the function of current limiting 10A is operating as shown in FIG. 2 (c). .

At this time, in the above-mentioned cooking, a high frequency output of about 500 W is output, a power supply current of about 10 A flows, and the cooking time is similarly calculated in the microcomputer 4 and extended to about 5 minutes and 36 seconds. (10 A × 336 SEC = 3360 A.SEC) As described above, it is displayed on any of the display means 6 set by the maximum current setting means 5 in FIG. 2 (a), FIG. 2 (b) or FIG. 2 (c). Even when the setting contents are set, the amount of electric power is about 3360 A.SEC when cooking the same heated object.

The user may set the maximum current setting value to the maximum value (14 A) or the restricted state (12 A or 10 A) according to the usage status of home electric appliances and the contract status with the electric power company.

This setting can be set to the restricted state at all times, and may be set to the restricted state only when another electric product is used.

Further, since the set value set by the maximum current setting means 5 is stored in the non-volatile memory 7, for example, a power failure or breaker breakage due to excessive use of power occurred in the setting state of 10 A limit. Even in such a case, the above-mentioned set value is continuously displayed on the display means 6 when the power is restored, and the continuous cooking may be performed without setting the above-mentioned set value again.

Further, the cooking time required for heating and cooking the object to be heated is automatically adjusted to the current limiting state by the microcomputer 4 when the consumption current to be used for the heating and cooking is set by the maximum current setting means 5, so that it is used. When cooking the same kind of objects to be cooked, a person can obtain almost the same finished cooking results according to the above-mentioned set values without being aware of the current limiting state.

[0028]

[Effect of device]

 The maximum current consumption can be easily set and set by adjusting the cooking time by the microcomputer so that the power consumption during heating and cooking will be almost constant according to the setting contents of the maximum current setting means during heating and cooking. The high-frequency output can be controlled so that it falls within the settable value that can be changed, and the breaker shuts off, enabling parallel operation with electrical products that could not be used before.

Further, the set value of the maximum current consumption is stored in the non-volatile memory in which the setting content of the maximum current setting means is readable / writable, so that the set value described above is also set at the time of re-energization after a temporary power failure or breaker cutoff. It is possible to provide a high-frequency heating device that is easy to use and does not need to be set again, and has improved usability.

[Brief description of drawings]

FIG. 1 is a system block diagram of a high frequency heating apparatus according to an embodiment of the present invention.

FIG. 2 is a diagram showing an example of transition of display contents displayed on the display means.

[Explanation of symbols]

 1 heating chamber 2 magnetron 3 inverter power supply unit 4 microcomputer 5 maximum current setting means 7 non-volatile memory

Claims (2)

[Scope of utility model registration request] 1. A heating chamber (1) for heating and cooking an object to be heated,
A magnetron (2) for supplying high frequency into the heating chamber,
An inverter power supply unit (3) for supplying a high frequency high voltage to the magnetron, a microcomputer (4) for transmitting predetermined power data to the inverter power supply unit according to cooking contents, and a maximum current consumption for the heating and cooking. And a readable / writable non-volatile memory (7) which stores the setting contents of the maximum current setting means (5) and which stores the setting contents of the maximum current setting means even after the power failure is recovered. High frequency heating device. 2. The high frequency heating apparatus according to claim 1, wherein the microcomputer adjusts the cooking time so that the amount of power consumed for the cooking is substantially constant according to the setting contents of the maximum current setting means.